Full error message text:
This scene contains legacy 3ds Max effects that could decrease the rendering performance. We recommend deleting them unless they are necessary. Learn more / Delete the legacy volumetric shaders
This message appears when any 3ds Max environment effects are detected during scene opening. They can be found under Rendering > Environment > Environment tab > Atmosphere. In some cases, these effects can significantly decrease the rendering performance.
- We recommend removing all those effects by clicking the "Delete the legacy volumetric shaders" button. This can prevent hard-to-diagnose performance issues.
- If you are sure that you wish to keep those effects and accept the risk of lowered rendering performance, you can click the "Ignore similar messages" button to stop any further detection of the 3ds Max environment effects in the current scene.